He argues that differences between societies lead to profound differences between languages, but fails to drive the point home fully.

他认为，社会之间的差异导致不同语言之间的深刻分歧，却不能充分证明其原理。

He didn’t have to drive the point home. The videotape had done that.

【drive】他不必详加解释，看了录像带就很明白了。

Events like the conflict between Azerbaijan and Armenia and the rioting in  Kazakhstan drove the point home.

阿塞拜疆和亚美尼亚之间的冲突以及哈萨克斯坦的骚乱等事件使这一点深入人心。

You had a very nice line on this in your piece that I think drives the point home.

你在你的文章中对此有一句非常好的台词， 我认为这很能说明问题。